Speeding Up Queries with Semi-Joins and Anti-Joins: How Oracle Evaluates EXISTS, NOT EXISTS, IN, and NOT IN

(Roger Schrag) Optimizing SQL usually gives the most significant results when DBAs are called upon to “make the system run faster.” Using tools like Statspack or Enterprise Manager, it is often easy to find the slow SQL. But how do you make the queries run faster? That is the challenge! In this

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